I need me a new exaust system for my 2005 stepside sierra z/71. I wans flowmasters but i need good sound as well as good gas (i was told flowmaster help with gas milege)

Plus if you could tell me a good lift that would help also.

Thanks for your help

 

I had Flow Masters - sound is not tuned. Corsa you can roll a softball through one end to another, the over 900 CC more flow and dyno results are 6 hp on the 5.3 ltr. As for a lift you're on your own.

Rich

 

all you're gonna do is drive the thing harder to hear the pipes!!! same or less gas mileage is realistic...